Although the iPhone 4S is said to have a maximum of 200 hours of standby time  based on Apple’s documentation (though it is still shorter than the 300 hours of standby talk time the iPhone 4 has and 250 hours of standby time the first generation iPhone has), owners of an iPhone 4S are experiencing a shorter battery life than expected. Though with its 5.3 watt-hour battery life, which is slightly more than the iPhone 4’s 5.25 watt-hour battery life, users are experiencing a shorter battery life. Some owners are even reporting that the iPhone 4s takes 10% of the battery every hour in standby, roughly half of the standby usage.

Although reports of users running the device in a clean state without any apps and have Siri turned off still experience a dreaded battery life. In the Gardian, one user who is experiencing a dreaded battery life reports that one of Apple’s engineer has contacted them saying…

reaching out’ to users for data and admitted this was an issue (and that they aren’t close to finding a fix!) and asked lots of questions about my usage and then asked if he could install the file below and that he would call back the day after to retrieve the info. I extracted the file from my Mac after a sync and emailed it to him

Some cases reports that the short battery life is blamed by the contacts being corrupted from MobileMe or Google’s contact list to the new iCloud service and suggested that re-installing the service will fix the issue. Most users are guessing that the problem is due to Siri running in the background.

This problem has created huge discussion in Apple’s support forum hoping to find some way to fix the battery issue.

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